Buying before a flat is built requires a different kind of due diligence. This guide to off plan contracts explains what an investor is agreeing to, when money becomes committed and which terms deserve close attention before exchange.
For a buy-to-let purchase, the contract is not simply a route to collecting keys. It sets the timetable for funding, defines what the developer must deliver and establishes your position if the build programme changes. A well-structured off-plan contract can give certainty around price and ownership; it cannot remove development, financing or market risk.
What is an off-plan contract?
An off-plan contract is the legal agreement used to buy a property before construction is complete. In most new-build purchases in England and Wales, the process begins with a reservation, followed by the issue of a contract pack by the developer’s solicitor. Your conveyancer reviews the documents, raises enquiries and advises whether you should exchange contracts.
At exchange, the purchase becomes legally binding. You will usually pay a deposit, often 10% of the purchase price, although the precise amount and structure can vary. Completion takes place later, typically after the building has reached practical completion and the legal paperwork is ready. At that point, the balance of the price is due and ownership transfers.
The gap between exchange and completion is the defining feature of off-plan investing. It may be several months or longer, depending on the stage of construction. That time can be useful for organising finance, but it also introduces uncertainty that buyers should model realistically.
Start with the reservation agreement
The reservation agreement gives you a limited period to decide whether to proceed, commonly while your solicitor carries out initial checks. It should identify the specific flat, agreed price, reservation fee, deadline for exchange and the circumstances in which the fee is refundable.
Read the refund terms rather than assuming a reservation fee will come back if you change your mind. A fee may be retained if you withdraw without a contractual reason, while some developments allow a refund if the developer cannot meet a stated condition. Ask what happens if your mortgage valuation is lower than expected, if your lending position changes or if material information about the scheme is amended.
This is also the point to confirm exactly what is included. Parking, storage, furniture packs and incentives should be recorded in writing. Verbal assurances are difficult to rely on later.
The key clauses in off-plan contracts
Your solicitor should explain the contract in detail, but investors benefit from knowing where the commercial risks usually sit. The following areas merit particular attention.
Completion dates and the longstop date
Developers rarely promise completion on one fixed calendar date because construction programmes can be affected by weather, supply chains, utilities and inspections. Instead, the contract may give an anticipated completion window and allow completion once the property is practically complete.
The longstop date is especially important. This is the date after which you may have a right to terminate if the development has not completed, subject to the wording of the contract. Check whether the date is realistic, whether it can be extended and whether termination means your deposit is returned in full. A longstop date protects against indefinite delay, but it does not compensate for lost rental income, changed mortgage conditions or an altered market.
Deposit protection and stakeholder arrangements
Establish where your deposit will be held. A deposit held by the developer’s solicitor as stakeholder is generally not released to the developer before completion without the buyer’s consent or a contractual trigger. Other arrangements may be supported by a deposit protection policy or warranty.
The right arrangement depends on the development and legal structure, but the question is straightforward: if the developer became insolvent before completion, what protection applies to your deposit? Do not treat the answer as a formality. Your solicitor should confirm it from the contract and supporting documents.
Plans, specification and permitted changes
Off-plan buyers purchase from plans and a specification, not from a finished flat. The contract will commonly allow the developer to make reasonable changes where required by building regulations, planning conditions, suppliers or construction needs.
That flexibility is understandable, but it needs limits. Review the plans, dimensions, orientation, floor level, balcony, parking allocation and finishes. Ask how the contract defines a material change and whether you have a remedy if the final property differs significantly from what was sold. Small variations in layout can be normal; a reduction in amenity, a changed outlook or the loss of an advertised feature may be commercially significant.
Leasehold terms and running costs
Most new-build city-centre flats are leasehold. The lease will set out the length of the term, service charge provisions, rights of access, restrictions on use and the management arrangements for shared spaces.
For a buy-to-let investor, service charge deserves the same scrutiny as the purchase price. Ask for the initial budget, what it includes, whether concierge or communal facilities create additional operating costs, and how costs will be apportioned between flats. A budget is an estimate, not a cap. Costs can rise, particularly when a building is new and actual usage becomes clear.
Review restrictions on letting, short-term lets, pets, alterations and assigning the contract before completion. If you intend to use a letting agent or buy through a company, make sure the legal structure allows it. Ground rent on most new residential leases is now restricted to a peppercorn, but the lease should still be reviewed in full rather than assessed on one headline point.
Warranties, defects and snagging
A recognised new-home warranty provides important protection, but it is not a substitute for a careful inspection. The contract should identify the warranty provider and the cover available.
Before completion, arrange a snagging inspection where the development timetable permits. Snagging covers defects or incomplete items, such as poor finishes, faulty fittings or doors that do not close properly. Record issues clearly and understand the developer’s process for rectification. Minor snags should not normally prevent completion, but unresolved defects need a documented route to resolution.
Funding an off-plan purchase
Mortgage planning is one of the most common pressure points. A mortgage offer issued at exchange may expire before completion, particularly where construction takes longer than expected. Lenders can reassess affordability, rental coverage, property valuation and lending criteria before funds are released.
Build in a contingency. Consider whether you could meet a higher interest rate, contribute more equity following a down-valuation or refinance if your original lender is no longer available. Cash buyers should also plan for the full completion statement, including legal fees, stamp duty land tax and any applicable additional-property surcharge. Tax rules and rates can change, so personal advice from a qualified tax adviser is appropriate before committing.
International and remote buyers should factor in currency movement, identity checks, source-of-funds evidence and the time needed to transfer money. These are manageable requirements when dealt with early; they are far harder to resolve after a completion notice has been served.
Exchange is the point of commitment
Once contracts are exchanged, withdrawing can mean losing the deposit and potentially facing further costs. That is why the period before exchange should be used properly, not treated as a procedural delay.
Your conveyancer should review title, planning permissions, building regulations, the lease, warranty, management company documents and any Section 106 obligations affecting the scheme. You should separately assess the investment case: likely tenant profile, local supply, realistic rent, service charge, void allowance and exit strategy. Gross yield is rent divided by purchase price; net yield reflects operating costs and is usually the more useful measure for a landlord.
For Leeds schemes, tenant demand should be linked to the actual micro-location rather than city-wide headlines. Access to employment areas such as Wellington Place, transport, daily amenities and the quality of the finished rental offer can all influence letting prospects. Regeneration can support an area over time, but it does not guarantee capital growth or protect a landlord from void periods.
What happens at completion?
When the flat is ready, the developer’s solicitor serves a completion notice. The contract may allow a short period, often around ten working days, for the buyer to provide the balance and complete. Missing that deadline can trigger interest and, in serious cases, contractual remedies including loss of deposit.
Before funds are requested, confirm that your mortgage, buildings insurance arrangements, identification checks and completion monies are all in place. Your solicitor will complete the purchase, register ownership and deal with the leasehold and tax filings. After completion, focus shifts to furnishing, compliance, marketing and tenancy set-up.
A contract cannot make an off-plan purchase risk-free, but it can make responsibilities clear. The strongest position is to exchange only when the legal documents, funding plan and rental assumptions have all been tested against a realistic completion timeline.